#include<stdio.h>
#include<string.h>

FILE *fin,*fout;

char s1[2000002],s2[2000002];
int p[2000001],l1,l2;
int res[2000001],pos;

int main()
{
    fin=fopen("strmatch.in","r");
    fout=fopen("strmatch.out","w");

    fscanf(fin,"%s",s1);
    l1=strlen(s1);
    fscanf(fin,"%s",s2);
    l2=strlen(s2);

    int k=0;
    for(int i=2;i<l1;i++)
    {
        while(k>0&&s1[k+1]!=s1[i])
        {
            k=p[k];
        }
        if(s1[k+1]==s1[i])
        {
            k++;
        }
        p[i]=k;
    }

    k=0;
    for(int i=1;i<l2;i++)
    {
        while(s2[i]!=s1[k+1]&&k>0)
        {
            k=p[k];
        }
        if(s2[i]==s1[k+1])
        {
            k++;
        }
        if(k==l1-1)
        {
            pos++;
            res[pos]=i-k;
            k=p[k];
        }
    }
    fprintf(fout,"%d\n",pos);
    for(int i=1;i<=pos;i++)
    {
        fprintf(fout,"%d ",res[i]);
    }
}